I don't exactly get what you are saying, so I'm practically guessing. If you restate I will gladly help you.
Answer:
What do you want us to do? Write your report, this is for help on questions, not to do your entire assignment.
Answer:
To watch his woods fill up with snow.
Explanation:
Frost is just stopping because he is struck by the beauty of a single scene, a single aspect of nature which we can all relate to--the snow, the trees, the silence.
I think the answer are A & B.
